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Appleton Tower subnets and VLANs
The School of Informatics has some 40 or so different IP subnets in use.
Each of these serves a particular purpose but, for users in Appleton Tower, the six most important subnets are:
| Subnet | Purpose |
|---|---|
| 129.215.2.0/23 | DICE desktop machines in student labs |
| 129.215.199.0/25 | Self-managed machines in staff offices using static IP addresses |
| 129.215.199.128/25 | Self-managed machines in staff offices using dynamically-assigned IP addresses |
| 129.215.212.0/24 | DICE desktop machines, and Windows managed desktop machines, in staff offices |
| 192.168.105.0/24 | Self-managed machines in open areas (using both dynamically-assigned and static IP addresses) |
Each of these subnets is carried on a particular VLAN - i.e. a virtual 'piece of ethernet'. The mapping of the above subnets to VLANs is:
| Subnet | VLAN name | VLAN number |
|---|---|---|
| 129.215.2.0/23 | ATLABS | 2 |
| 129.215.199.0/25 | R | 199 |
| 129.215.199.128/25 | ATDHCP | 4027 |
| 129.215.212.0/24 | M | 212 |
| 192.168.105.0/24 | ATopen | 505 |
In addition, VLAN 952 - called 'phones' - is used to carry the traffic to and from VoIP telephones in AT.
All of this means that, for example, should you want to use a laptop in Appleton Tower on the 192.168.105.0/24 subnet, it must be connected to a network port which has been configured to be on the 'ATopen' VLAN.
Last reviewed:
13/01/2022